Here is how your replace the fluid on a 6R80 transmission on a 2013 Ford F150 Raptor.

Transmission Oil Filter Ford (BL3Z7A098A) Note, there is an A and a B model. Not OEM: https://amzn.to/4d6T4K8
1 QT Mercon LV: https://amzn.to/3TvgHow
Note, transmission and transfer case use the same fluid :)
5 QT Mercon LV: https://amzn.to/3MKKI03
I used a gasket from oriellys but it ended up leaking so I reused mine. Ford says the gasket is reusable anyways. But I still prefer to replace them
OEM filter: Transmission Oil Filter Ford (BL3Z7A098A)